Military TS-487/U Test Set
It includes a voltmeter of QRP range (3, 10 and 50 v pk-to-pk)
Includes a SO-239 female socket, with termination setting of 51, 75 or 470 (!) ohms
Operates on 115 VAC.
This item was pulled from a working environment and appears to be in good condition. It is sold as is with no warranty. No manual or peripherals are included.